Steam-engine valve.



F. H. & F. 0. BAL

k STEAM ENGINE VALVE.

' I LPPLIGATION FILED JULY 6, 1911.

1 059 922 Patented Apr. 22, 1913.

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STEAM ENGINE VALVE. APPLIOATIQN FILED JULY 6, 1911.

1,059,922., Patented Apr. 22, 1913.

2 BHEETSSHEET 2.

' i 1T A ATN 1Q FRANK H. BALL AND FREDERICK 0. BALL, 0F PLAINFIELD, NEWJERSEY.

STEAM-ENGIN E VALVE.

To all whom it may concern Be it known that we, FRANK H. BALL and FREDERIOK 0. BALL, citizens of the United States, residing at Plainfield,in the county of Union and State of New Jersey, have invented new anduseful Improvements in Steam-Engine Valves, of which the following is aspecification.

This invention relates to steam engine valves, and consists in certainimprovements in the construction thereof as will be hereinafter fullydescribed and pointed out in the claims.

In the use of balanced valves formed of telescoping parts, it has beencustomary to give a slight preponderance to the areas tending toseparate the valves so as to assure a proper seating of the surfaces ofthe valves in the operation of the engine. As steam pressures areincreased, the pressure incident to this difference of area tends toincrease the unbalanced condition of the valve and in some pressures toan extent to interfere with a desirable operation of the governor. Thedifliculty arising from the increase in pressure is not only due to theincrease in the unbalanced condition of the valve, but also to thegreater difliculty of properly lubricating the parts.

The object of the invention is to provide a valve of this type withmeans for preventing an undue pressure on the valve surfaces, and at thesame time for assuring a proper closure of the valve.

The invention is illustrated in the accompanying drawings as, follows:

Figure 1 shows a central section through the engine, steam chest andvalve. Fig. 2 a fragment of a plan view of the lower part of the valve.Fig. 8 is a section on the line 3-3 in Figs. 1 and 2.

1 marks the cylinder, 2 the piston, 3 the valve chest. Steam is admittedto the cen- ,ter of the chest at 5 and exhausts at the ends 6 of thechest. The double ported arrangement 7 and 8 is provided, the port 7leading from one face of the chest and the port 8 leading from the otherface of the chest. The valve is formed of the two parts 9 and 10. Thesehave the cylindrically shaped telescoping walls 11 and 12. The steamenters from the admission port 5 to the passage 13 in the valve. Thepassage 13 opens into the space inclosed by the walls 11 and 12. Thevalve passage 14- opens from the space opposite the passage 13. The

Specification of Letters Patent.

Application filed July 6, 1911.

Patented Apr. 22, 1913. Serial No. 637,076.

passage 13 operates on the ports 8 and the passage 14 on the ports 7.These parts are not new but are in accordance wit-h the type of valvenow in use.

Arranged across the passage 13 is a cross bar 15 and a similar cross bar16 is arranged across the passage 14. The cross bar 15 is provided witha perforation 15 preferably directly at the center of the valve. Thecross bar 16 has a screw threaded perforation at 17 also at the centerof the valve. A screw bolt 18 extends through the perforation 15 and isscrewed into the perforation 17. A lock nut 19 is provided for lockingthe screw in adjustment. A socket 20 is arranged in the lower face ofthe cross bar 15, surrounding the bolt and a spring 21 is arrangedaround the bolt in this socket and is tensioned against the two crossbars and tendsto separate the parts of the valve.

The screw bolt 18 is provided with a very fine pitch so that a very fineadjustment may be had. The head 18 of the screw operating on the crossbar 15 limits the separation of the parts. By adjusting this screw, theseparation may be so limited as to permit of a perfect seating of thevalve and at the same time, the screw relieves the valve surfaces ofpressure incident to an unbalanced condition of the valve. The springassures the seating of the valve initially. WVith the steam areas soarranged, there is a preponderance of steam pressure which tends toseparate the parts. After the initial adjustment of this valve, itautomatically maintains this adjustment. If the adjustment is such thatthe screw is slightly too loose so that there is too great a pressure onthe valve surfaces, the result is that these valve surfaces wear untilthe pressure is taken up by the screw. There is also a slight telescopicaction of the valve parts incident to the variations of pressure uponit, especially upon different parts of the valve in operation. This isparticularly true, if the valve surfaces do not perfectly seat. Byreason of this action of the parts if the screw is so tight as toprevent a perfect seating of the valve surfaces, there will be anexcessive wear on the head 18 of the screw so that it will allow such aseparation as to afford a perfect seating of the valve.

What we claim as new is:

1. A steam engine valve formed of parts having cylindrically shapedtelescoping walls and arranged to admit steam within extending from onebar and screwed into the other; and a spring arranged around the screwand tensioned against the bars.

In testimony whereof we have hereunto set our hands in the presence oftwo subscribing witnesses.

FRANK H. BALL. FREDERICK 0. BALL. Witnesses:

A. K. SMITH, ANNA H. BURKETT.

the said walls and to deliver steam from both sides of the valve; and ascrew arranged within the walls and-operating upon said parts forlimiting the separating move- 5 ment of the parts.

2. A steam engine valve comprising the parts 9 and 10 having the centralvalve passages 13 and 14 in the valve faces; the cylindrically shapedtelescoping walls 11 10 and 12; the cross bars 15 and 16 havingperforations at their centers; the screw 18 Copies of this patent may beobtained for five cents each, by addressing the Commissioner of Patents,Washington, D. G.

